UGS DRO incorrect

I have UGS installed on my computer and am using an Arduino Mega. I am wating on parts to install limit sewitches, but in the meantime have been using G92 to set up my work. However when I do G92Y-.25 to account for the endmill diameter the DRO reads Y = 0.010 rather than Y = 0.25. I am somewhat new to UGS so maybe a simple mistake any help or thoughts are appreciated. thanks